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Highly Efficient, Biochar-Derived Molybdenum Carbide Hydrogen Evolution Electrocatalyst

机译:高效,生物炭源的碳化钼氢析出电催化剂

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The establishment of an economic means of hydrogen production by electrochemical water-splitting can help alleviate the intermittency problem associated with renewable energy sources such as solar and wind, and also provide for the extensive commercialization of fuel cell technologies. To enable this, cheap, active, and stable hydrogen evolution catalysts that can replace precious metal catalysts such as Pt must be developed. Herein, a scalable synthesis of porous Mo2C nanostructures derived from biochar, an inexpensive plant byproduct, is reported. The Mo2C catalyst materials prepared using this solid-state method, loaded on planar substrates, require overpotentials of only 35 and 60 mV to drive current densities of -10 and -100 mA cm(-2) in 0.50 m H2SO4 solution and exhibit stable operation for 100 h at operating current densities of -10 and -100 mA cm(-2).
机译:通过电化学水分解产生氢的经济方法的建立可以帮助减轻与诸如太阳能和风能的可再生能源相关的间歇性问题,并且还为燃料电池技术的广泛商业化提供了条件。为了做到这一点,必须开发可以代替贵金属催化剂如Pt的廉价,活性和稳定的氢释放催化剂。在本文中,报道了源自廉价生物副产物生物炭的多孔Mo2C纳米结构的可扩展合成。使用这种固态方法制备的Mo2C催化剂材料,装载在平面基板上,仅需35和60 mV的过电势即可在0.50 m H2SO4溶液中驱动-10和-100 mA cm(-2)的电流密度,并表现出稳定的运行在-10和-100 mA cm(-2)的工作电流密度下持续100小时以上。

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